Melbourne: An estranged Indian-origin couple died today in a mysterious house fire in this Australian city.

Police said officers were in the area attending an unrelated matter when they observed a fire coming from a house in Hale Street early this morning.

Police, in a statement, said they entered the house and located a man, dragging him from the burning building. The man was taken to a local hospital with significant burns but has since died of his injuries.

The couple separated in August this year, The Australian newspaper reported.

Police did not confirm how Sargun died, but said her death is being treated as "suspicious".

The paper, citing its sources, reported that Sargun had been stabbed repeatedly.

Sargun had been married to Singh for a year and had been living in the Kew house for just three days. Singh, who had been in Australia for eight years, had been in conflict with his wife, the report said.